Quarterly Results of Operation (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Result of Operations (Unaudited) [Abstract]

Summary of the quarterly consolidated results of operations

Three Months Ended 2012	March 31		June 30		September 30		December 31
Interest income	$	16,826	$	16,523	$	18,719	$	20,460
Interest expense		3,628		3,517		3,720		3,457
Net interest income		13,198		13,006		14,999		17,003
Provision for loan losses		559		209		1,041		1,715
Gain (loss) on sale of securities		—		—		2		—
Net income		4,613		4,910		4,850		5,170
Net income available to common shareholders	$	4,457	$	4,804	$	4,787	$	5,014
Earnings per share:
Basic	$	0.60	$	0.65	$	0.56	$	0.58
Diluted		0.59		0.62		0.54		0.56
Average shares outstanding:
Basic		7,422,860		7,434,537		8,503,475		8,617,466
Diluted		7,598,490		7,728,519		8,838,659		8,964,315
Three Months Ended 2011	March 31		June 30		September 30		December 31
Interest income	$	15,431	$	15,712	$	16,011	$	17,460
Interest expense		4,364		4,249		4,020		3,868
Net interest income		11,067		11,463		11,991		13,592
Provision for loan losses		1,548		1,332		1,564		838
Gain (loss) on sale of securities		274		365		1,115		23
Net income		2,765		3,093		3,417		3,522
Net income available to common shareholders	$	2,489	$	2,816	$	2,707	$	3,460
Earnings per share:
Basic	$	0.34	$	0.38	$	0.37	$	0.47
Diluted		0.33		0.37		0.36		0.46
Average shares outstanding:
Basic		7,387,072		7,406,624		7,414,043		7,421,544
Diluted		7,612,144		7,598,180		7,596,570		7,576,052